Malicious PDF — malware analysis report

Static analysis result for SHA-256 9322098e85482c09…

MALICIOUS

PDF

70.7 KB Created: 2021-09-18 14:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8ea280d9f26c0703277e0efa01072867 SHA-1: f413581dd1af73d0f1e8328921bb4e19502a4b1b SHA-256: 9322098e85482c099da4e22953f40569fada7a8d2072369d86bc978036111d7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is unreadable, but the heuristic firings clearly identify the link farm nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5529

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://getadoc.in/ckfinder/userfiles/files/91231329938.pdf In PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/f73abcf8f4de1f9a9198fde5a5957bc4/49996754618.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/xatolitivumotajederuxod.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/kupapijinowixiwawaka.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/99179479327.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/98731bc4e00a628f5094d4e7da774491/45004698060.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/54044196333.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/58687820810.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/20888120733.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/38087966706.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/zudipanotine.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/36915158883.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/kotomumumenanilago.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/11448808404.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/91291979329.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/kulivutovafujipi.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/89332297066.pdfIn PDF document text
    • https://diphong.com/uploads/wuwebepewopudunoluzuxukub.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/49738008221.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/1ss8v1h7t56i247a2j0pd3jdv9/19017489386.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/84126550587.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/35897236519.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/70801929258.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/36866198632.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/munufamepifejuvibifadokow.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/31544887305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mario+gameboy+downloadPDF link annotation

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